• Question: how can you see a black hole?

    Asked by to Roberto on 23 Jun 2014. This question was also asked by .
    • Photo: Roberto Trotta

      Roberto Trotta answered on 23 Jun 2014:

      Black holes are invisible, but they are very massive, so they pull matter all around them. In particular, stars go around the central black hole of our galaxy. So we can look at what the orbits of the stars look like, and we see that they all seem to rotate around a dark, invisible spot — this is where the black hole is!

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